I think birthdays are VERY important. I use them many times to try to get a language sample. Most kids have a birthday that was very memorable or at the very least a dream birthday party in mind, so I created a little birthday graphic organizer. While I wouldn't necessarily use this as part of a language sample, I could see using this after the fact to help students remember and recall a very special day. I also think it helps reinforce that very special calendar date (which a surprising number of my elementary friends do not know!).
While they overall could be perceived as boy/girl, I think either one is appropriate for either gender. Again, I realize that you will probably print this in black and white, but I am in love with that shade of blue!
Below is a free downloadable PDF of each of the birthday organizers. Before downloading or pinning or etc., please share what you do to help celebrate your students' birthdays!